Use setup-python v4.

[iurisilvio]

No description provided.

[codecov-commenter]

Codecov Report

Merging #25 (a89098d) into main (cd354e7) will decrease coverage by 0.12%.
The diff coverage is 88.31%.

@@            Coverage Diff             @@
##             main      #25      +/-   ##
==========================================
- Coverage   93.70%   93.59%   -0.12%     
==========================================
  Files          17       18       +1     
  Lines         397      437      +40     
  Branches       74       79       +5     
==========================================
+ Hits          372      409      +37     
- Misses         15       17       +2     
- Partials       10       11       +1     

Impacted Files	Coverage Δ
django_migrations_ci/tests/conftest.py	100.00% <ø> (+7.14%)	⬆️
...ngo_migrations_ci/management/commands/migrateci.py	78.40% <65.21%> (-2.42%)	⬇️
...ango_migrations_ci/tests/test_migrateci_command.py	98.71% <97.50%> (-1.29%)	⬇️
django_migrations_ci/conf.py	100.00% <100.00%> (ø)
django_migrations_ci/django.py	96.69% <100.00%> (ø)

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